Weight:8.4 oz . Bonded Seamless Upper with interior seam taping creates an unparalleled fit with a seam-free, extremely breathable upper . Memory Foam in collar provides custom like fit . Energy Foam cushions the forefoot upon impact and then returns energy back to the runner. Energy Foam heel crash pad. Full blown rubber forefoot outsole with carbon rubber heel crash pad. Ortholite sockliner for amazing step-in comfort and long-lasting cushioning. Reflective laces . Race Last. Heel to toe offset 19 mm / 10 mm.